MOTU/Bugs wiki page cleanup

[Andy Price]

After a bit of confusion caused by some wrong information on the
MOTU/Bugs wiki page, I've taken the liberty of starting to clean it up.
I've tried to stick to the new MOTU template layout and to redo the
structure and text of the page to make it more helpful to new
contributors. It's still not entirely perfect, but it's a start.

For reference: https://wiki.ubuntu.com/MOTU/Bugs

I'd welcome any criticism or ideas to make this page better.

Thanks
--
Andy Price | welshbyte
http://andrewprice.me.uk